package com.beibie.yunpicturebackend.service.impl;


import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.util.ObjectUtil;
import cn.hutool.core.util.StrUtil;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.beibie.yunpicturebackend.Excption.BusinessException;
import com.beibie.yunpicturebackend.Excption.ErrorCode;
import com.beibie.yunpicturebackend.constant.UserConstant;
import com.beibie.yunpicturebackend.mapper.UserMapper;
import com.beibie.yunpicturebackend.model.dto.user.UserQueryRequest;
import com.beibie.yunpicturebackend.model.entity.User;
import com.beibie.yunpicturebackend.model.enums.UserRoleEnum;

import com.beibie.yunpicturebackend.model.vo.LoginUserVO;
import com.beibie.yunpicturebackend.model.vo.UserVO;
import com.beibie.yunpicturebackend.service.UserService;

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import javax.servlet.http.HttpServletRequest;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;


/**
* @author admin
* @description 针对表【user(用户)】的数据库操作Service实现
* @createDate 2025-02-20 16:39:09
*/
@Service
@Slf4j
public class UserServiceImpl extends ServiceImpl<UserMapper,User>implements UserService {


    public long userRegister(String userAccount, String userPassword, String checkPassword) {
        // 1. 校验
        if (StrUtil.hasBlank(userAccount, userPassword, checkPassword)) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "参数为空");
        }
        if (userAccount.length() < 3) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "用户账号过短");
        }
        if (userPassword.length() < 3 || checkPassword.length() < 3) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "用户密码过短");
        }
        if (!userPassword.equals(checkPassword)) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "两次输入的密码不一致");
        }
        // 2. 检查是否重复
        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("userAccount", userAccount);
        //查询数据库有几条数据
        long count = this.baseMapper.selectCount(queryWrapper);
        if (count > 0) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "账号重复");
        }
        // 3. 加密
        String encryptPassword = getEncryptPassword(userPassword);
        // 4. 插入数据
        User user = new User();
        user.setUserAccount(userAccount);
        user.setUserPassword(encryptPassword);
        user.setUserName("北别");
        user.setUserRole(UserRoleEnum.USER.getValue());
        boolean saveResult = this.save(user);
        if (!saveResult) {
            throw new BusinessException(ErrorCode.SYSTEM_ERROR, "注册失败，数据库错误");
        }
        return user.getId();
    }

    /**
     *用户登录
     * @param userAccount
     * @param userPassword
     * @param request
     * @return
     */
    @Override
    public LoginUserVO userLogin(String userAccount, String userPassword, HttpServletRequest request) {
        // 1. 校验
        if (StrUtil.hasBlank(userAccount, userPassword)) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "参数为空");
        }
        if (userAccount.length() < 3) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "用户账号");
        }
        if (userPassword.length() < 3 ) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "用户密码错误");
        }
        // 2. 加密
        String encryptPassword = getEncryptPassword(userPassword);
        // 3. 查询数据库中的用户是否存在 不存在 抛异常
        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("userAccount", userAccount);
        queryWrapper.eq("userPassword", encryptPassword);
        User user= this.baseMapper.selectOne(queryWrapper);

        if (user == null) {
            log.info("user login failed,userAccount not existed or mistake password");
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "用户不存在或者密码错误");

        }
        //4 保存登录状态
         request.getSession().setAttribute(UserConstant.USER_LOGIN_STATE,user);

         return this.getLoginUserVO(user);

    }

    /**
     *
     * @param userPassword
     * @return
     * 获取加密后的密码
     */
    @Override
    public String getEncryptPassword(String userPassword) {


        final  String salt="beibie";
        return DigestUtils.md5DigestAsHex((salt+userPassword).getBytes());

    }
    /**
     *获取脱敏类的用户信息
     * @param user 用户
     * @return 脱敏类的用户信息
     */

    @Override
    public LoginUserVO getLoginUserVO(User user) {


        return BeanUtil.copyProperties(user,LoginUserVO.class);
    }

    @Override
    public User getLoginUser(HttpServletRequest request) {

        //判断用户是否已经登录
        Object userObj = request.getSession().getAttribute(UserConstant.USER_LOGIN_STATE);
        User currentUser = (User) userObj;
        if (currentUser == null || currentUser.getId() == null){
            throw new BusinessException(ErrorCode.NOT_LOGIN_ERROR);

        }
        //从数据库中查询
        Long userId = currentUser.getId();
        currentUser = this.getById(userId);
        if (currentUser == null){
            throw new BusinessException(ErrorCode.NOT_LOGIN_ERROR);
        }
        return currentUser;
    }

    /**
     *用户注销
     * @param request
     * @return
     */

    @Override
    public Boolean userLogout(HttpServletRequest request) {
        //判断用户是否已经登录
        Object userObj = request.getSession().getAttribute(UserConstant.USER_LOGIN_STATE);
        if (userObj == null){
            throw new BusinessException(ErrorCode.OPERATION_ERROR,"未登录");
        }
        //移除登录态
        request.getSession().removeAttribute(UserConstant.USER_LOGIN_STATE);
        return true;
    }

    /**
     *
     * @param user
     * @return
     */
    @Override
    public UserVO getUserVO(User user) {

        if (user == null) {
            return null;
        }
        UserVO userVO = new UserVO();
        BeanUtils.copyProperties(user,userVO);
        return userVO;
    }
    /**
     *获取脱敏类的用户信息
     * @param userList 用户列表
     * @return 脱敏类的用户信息
     */

    @Override
    public List<UserVO> getUserVOList(List<User> userList) {
        if (CollUtil.isEmpty(userList)) {
            return new ArrayList<>();
        }
        return userList.stream().map(this::getUserVO).collect(Collectors.toList());

    }

    @Override
    public QueryWrapper<User> getQueryWrapper(UserQueryRequest userQueryRequest) {
        if (userQueryRequest == null) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "请求参数为空");
        }
        Long id = userQueryRequest.getId();
        String userName = userQueryRequest.getUserName();
        String userAccount = userQueryRequest.getUserAccount();
        String userProfile = userQueryRequest.getUserProfile();
        String userRole = userQueryRequest.getUserRole();
        String sortField = userQueryRequest.getSortField();
        String sortOrder = userQueryRequest.getSortOrder();
        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
            queryWrapper.eq(ObjectUtil.isNotNull(id), "id", id);
            queryWrapper.eq(StrUtil.isNotBlank(userRole), "userRole", userRole);
            queryWrapper.like(StrUtil.isNotBlank(userName), "userName", userName);
            queryWrapper.like(StrUtil.isNotBlank(userAccount), "userAccount", userAccount);
            queryWrapper.like(StrUtil.isNotBlank(userProfile), "userProfile", userProfile);
            queryWrapper.orderBy(StrUtil.isNotEmpty(sortField), sortOrder.equals("ascend"),
                    sortField);
return queryWrapper;
    }

    @Override
    public boolean isAdmin(User user) {
        if (user == null) {
            return false;
        }
        return !UserRoleEnum.ADMIN.getValue().equals(user.getUserRole());
    }

}




